![]() ![]() The Sun will pass directly above the equator, bringing nearly equal amounts of day and night on all parts of Earth. These simultaneous seasons will occur March 20, 2022, at 15:33 UTC (Coordinated Universal Time) or 10:33 a.m. Seasons are reversed in the Southern Hemisphere where it will be autumn, also known as fall. The March equinox – also called the vernal equinox – is the astronomical beginning of the spring season in the Northern Hemisphere. (Image not to scale) Credits: NASA/GSFC/Genna Duberstein ![]() During the equinoxes, both hemispheres receive nearly equal amounts of daylight. An illustration of the March (spring) and September (fall or autumn) equinoxes. However, “astronomical” seasons happen because of the tilt of Earth’s axis (with respect to the Sun-Earth plane), and our planet’s position during its orbit around the Sun. For instance, the meteorological season of spring begins each year on March 1 and will end on May 31. “Meteorological seasons” follow the changing of the calendar, month to month, and are based on the annual temperature cycle – seasonal temperature variations modified by fluctuations in the amount of solar radiation received by Earth’s surface over the course of a year. All solar data may be intermittently updated as improvements become available, with significant updates described on the solar portal.Did you know our planet has two types of seasons? They are meteorological and astronomical.Please visit (or subscribe to) our Updates to One Minute Solar Data and Changes to Solar Data pages to keep informed of updates. Hourly solar grids and one minute solar data are updated at various times during the year.Daily solar maps and grids on the web are updated before sunrise the following day.air temperature, wind speed, humidity, etc.) from each of those stations over the same period of time (if available) can also be obtained from the Bureau for a cost recovery charge. Please refer to the summary of available solar data before sending a request.Ī USB drive containing all available one minute solar data from more recent ground-based solar observation stations, as well as one minute weather data (e.g. Measurements of thirty minute and daily total solar energy from a small network of specialised ground observation stations are available at a cost recovery charge. Hourly direct normal & global solar irradiance.Monthly average hourly global and direct normal solar exposure.Daily solar exposure (bulk supply of all available grids).Himawari-8/9 Surface Global Solar Irradiance.In a typical agricultural area, such as that around Wagga Wagga, the satellite-derived data become more accurate than extrapolating surface station values at distance of around 40 km from the ground station.Ĭharges Solar data available by request Gridded spatial data Satellite data are freely available on the web down to daily resolution, while hourly and ten-minute grids are available on request at cost recovery charges. Satellite data provide coverage across Australia, but fewer parameters are available. Ground stations provide observations with lower uncertainty than satellite-derived data, but are are relatively sparsely distributed. Apart from the one minute solar data, all solar data on this website have been derived from satellite observations. ![]() This network is complemented by a system which provides global solar irradiance and derived products from satellite imagery. The Bureau of Meteorology maintains a network of high quality ground stations which provide one minute statistics on a range of solar parameters, including direct, diffuse and global solar irradiance and terrestrial (longwave) irradiance. ![]()
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